From 7856ba881a7de2d490fc1a90d2bbeb294492b0cb Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <eelco.dolstra@logicblox.com>
Date: Tue, 17 Sep 2013 16:00:36 +0200
Subject: [PATCH] linux: Enable proper blkio controller support

Having BLK_CGROUP is not enough, you need BLK_DEV_THROTTLING or
CFQ_GROUP_IOSCHED to do anything useful.
---
 pkgs/os-specific/linux/kernel/common-config.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/os-specific/linux/kernel/common-config.nix b/pkgs/os-specific/linux/kernel/common-config.nix
index d4f7c4e6718..45cd135fbbe 100644
--- a/pkgs/os-specific/linux/kernel/common-config.nix
+++ b/pkgs/os-specific/linux/kernel/common-config.nix
@@ -242,6 +242,8 @@ with stdenv.lib;
     CGROUP_MEM_RES_CTLR_SWAP y
   ''}
   DEVPTS_MULTIPLE_INSTANCES y
+  BLK_DEV_THROTTLING y
+  CFQ_GROUP_IOSCHED y
 
   # Enable staging drivers.  These are somewhat experimental, but
   # they generally don't hurt.